BigDecimal不整除的一个异常java.lang.ArithmeticException: Non-terminating decimal expansion
2011-09-09 18:06
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金额的数据类型是BigDecimal
通过BigDecimal的divide方法进行除法时当不整除,出现无限循环小数时,就会抛异常的,异常如下:java.lang.ArithmeticException:
Non-terminating decimal expansion; no exact representable decimal result. at java.math.BigDecimal.divide(Unknown Source)
应用场景:一批中供客户的单价是1000元/年,如果按月计算的话1000/12=83.3333333333....
解决之道:就是给divide设置精确的小数点divide(xxxxx,2, BigDecimal.ROUND_HALF_EVEN)
通过BigDecimal的divide方法进行除法时当不整除,出现无限循环小数时,就会抛异常的,异常如下:java.lang.ArithmeticException:
Non-terminating decimal expansion; no exact representable decimal result. at java.math.BigDecimal.divide(Unknown Source)
应用场景:一批中供客户的单价是1000元/年,如果按月计算的话1000/12=83.3333333333....
解决之道:就是给divide设置精确的小数点divide(xxxxx,2, BigDecimal.ROUND_HALF_EVEN)
在 java中, 四舍五入通过 BigDecimal 来实现。一定要注意:BigDecimal is Immutable。 也就是跟String一样,对前一个的修改,比如setScale(), add()等都会返回一个新的BigDecimal. 四舍五入舍入模式是 BigDecimal.ROUND_HALF_UP BigDecimal定义了一下舍入模式,只有在作除法运算或四舍五入时才用到舍入模式, 下面简单介绍,详细请查阅J2se API文档
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